Usain Bolt said this quote

I work hard, and I do good, and I’m going to enjoy myself. I’m not going to let you restrict me.

~ Usain Bolt

Thankfully, Coach had taught me a way of embracing the pain. He called that overwhelming rust of hurt 'The Moment of No Return', a point of pure agony when the body told an athlete to quit, to rest, because the pain was so damn tough. It was a tipping point. He reckoned that if an athlete dropped in The Moment, then all the pain that went before it was pointless, the muscles wouldn't increase their current strength. But if he could work through the pinch and run another two reps, maybe 3, them the body would physically improve in that time, and that was when an athlete grew stronger.

~ Usain Bolt

In track years... track is not like other sports. You do have track athletes that stay in this sport until, like, 35, 36, but I think when you get to 28, it's really difficult.

~ Usain Bolt

Manners is the key thing. Say, for instance, when you're growing up, you're walking down the street, you've got to tell everybody good morning. Everybody. You can't pass one person.

~ Usain Bolt